14 



1) Cgracilicauda (Brady). Syn.: C'yclopicera gr. Brady, Ascomy- 

 zon comatulae Kosoll, Clausomyzon gr. Giesbr. — Britische Ins., Triest 

 Neapel, Boulogne-sur-mer. — t«- Q 0,7 — 0,8, ç^ 0,55 mm. 



2) C. Catini n. — Neapel. — L. $ 0,G— 0,65, (f 0,5—0,53 mm. 



3) C. elegans A. Scott. — Port Erin. — L. $ 1 mm. 



(Schluß folgt.) 



II. Mittheìlimgen aus Museen, Instituten etc. 



1. New York Academy of Sciences, Biological Section. 



November 9th, 1886. — Members of the Columbia University Expe- 

 dition, to Puget Sound made reports on the Summer's Work. Mr. N. K,. 

 Harrington gave a short narrative of the expedition including a descrip- 

 tion of the equipment of the Laboratory, dredging, investigation and plank- 

 ton collection. In addition he made a report on the Echinoderms, Crusta- 

 cea and Annelids. Mention was made of the relation of asymmetry in Scu- 

 tella excentricus to its habit of burrowing and its vertical position in the sand. 

 Abundant material, both larval and adult, of Entnconcha. This mollusc had 

 been noted by Müller in 1852 and Baur in 1864 in Synapfa digitata and by 

 Semper in Holothurla cdulis. The present material was found in an undeter- 

 mined species 0Ï Holoihuriu. About forty species each of Crustacea, Anne- 

 lids and Echinoderms have been identified. — Mr. Bradney B. Griffin 

 presented the following report on the Platodes, Nemerteans and Molluks: 

 The Platodes and Gephyrea are relatively scarce. They are represented so- 

 lely by two Dendrocoels, and one Phymosoma respectively. The Nemertines 

 occur very abundantly, fully fifteen different species were obtained, most of 

 which appear to be undescribed, though some seem to approach more or 

 less closely the European forms rather than those of the east coast of Ame- 

 rica. The European species are the more numerous. The Molluscan fauna 

 is very rich and varied, ninety-three species of sixty-nine genera were col- 

 lected. These include among others the large Cryptoehiton Stelleri which 

 when alive and expanded measures over 20 cm, besides numerous smaller 

 species of Mopalia., Katherina^ Tonicella^ etc. that occur in vast numbers on 

 rocks and piles between tides. The Nudibranchs are notable from their 

 bright colors and large size : One species of Dehdronotits attains a length of 

 over 25 cm. Cases of color variation [Cardium and Acmaea) and color series 

 [Littorina) were to be met with as well as color harmonization ; many Chi- 

 tons and Limpets are colored so as to more or less resemble the spekled and 

 barnacled rocks upon which they occur. A complete series of Phoiadidea 

 penila (the "boring clam^'j was obtained which shows the gradual atrophy of 

 the foot and concrescence of the mantle edges as the adult condition is at- 

 tained. Specimens of Zirphaea cnspata were collected, a related form in which, 

 the foot remains functional throughout life. A series of maturation and 

 fertilization stages of this form was obtained. Lepton is not uncommon, a 

 Ijamellibranch that lives commensal attached by its byssus to the abdomen 

 of the Crustacan Gehia, and has caused the atrophy of the first pair of ab- 

 dominal appendages of its host. It has developed a median furrow on each 

 valve in adaptation to the body form of Gebia. An interesting case was ob- 

 served in which an otherwise nearly smooth Placuanomia shell had assumed 



