44 M. A. Milne-Edwards on the 



regions I may note a Pjcnogonidan living at 1918 metres, 

 and remarkable for its size * ; with the legs extended it mea- 

 sured 0*25 metre. In its external characters it greatly 

 approaches Colossendeis leptorhyncJius, Hoeck. It is the 

 giant of the Pycnogonidas of our seas. 



The Mollusca were very numerously repi'esented to the 

 north of Spain ; and several s])ecies were new. The subjoined 

 listf will give a faint idea of this fauna ; for the picking-out of 

 the smaller species is not yet completed. 



The Bryozoa form a notable proportion of the animals that 

 we have found upon rocky and pebbly bottoms. Twenty- 

 seven species belonging to known genera, and ten which must 

 be placed in new genera, have already been recognized by Dr. 

 Jullien. Interesting facts arise out of their investigation. Seto- 

 sella vulnerata presents ovicells only in the great depths of 

 1000 metres ; nearer the surface, whether in the Mediterra- 

 nean or near the Shetlands, it seems to be unable to reproduce. 

 Another species of the same genus, S. liicJiardii^ is distin- 

 guished by the unicellulate arrangement of the zoarium. We 

 may also indicate Anarth^-opora monodon^ Busk, Mucronella 

 ahyssicola, Norm,, Schizojiorella unicornis^ and 2Iuc>'oneUa 

 PeacJin, Johnst., which had not been previously met with in 

 these regions, and appeared only to exist either on the Shet- 

 land coasts or in the American seas. 



The collection of Coralliaria is especially remarkable for 

 the abundance and beauty of the specimens belonging to the 

 genera Lopliuhelia and Amphilielia. Lopliolielia prolifera was 

 dredged at about 1000 metres. Amj^tliihella oculata was ob- 

 tained from the same station, as well as Ami^hihelia rostrata^ 

 Pourtales, previously known only in the West-Indian sea. 



* Colossimdeis Villegentii, A. M.-E. — The rostrum is shorter than that 

 of C. leptorliynclius; but the body is lono;er. 



t Pteropoda : Cuvieria, Spirialis, Hijala'ct, Cleodora, &c. Gastero- 

 poda : Mwex Richardi, sp. n., Troplion vaginatus, Columhella acute- 

 costaia, Marginella clandestina, Hela teneUa, Trochus gemmulafus, Trochus 

 Vnilhmfii (affinis T. Otfoi, Philippi, from the Tertiaries of Sicily), Zizg- 

 phinus FdUni, sp. u., Turbo Jilusiis (identical with those from the .Sicilian 

 Tertiaries), Solarium discus, I'yrumidella ineditirrtmea, AcUeon cxilis, Sca- 

 phander punctost7-iutns. Scai'HOPODA : Siphoneritalis quinquangtilaris, 

 Uentalium agile. Lamellibranchiata : Spondglus Gussoni, Lima 

 Mai'ionis, sp. n., Amusimn lucidum, Pecten vitreus, P. Hoskynsi, Limopsis 

 aurita, L. miniita, Area nodulosa, Nucula sulcata, Malletia ohtusa, M. 

 cimeata, Necera rostrata, N. striata, Axinus ferrugineus, A. hiplicatns, 

 Lyonsia forinosa, Syndesmya longicaUus, &c. liEACHiOPODA : IWe- 

 bratella septata, Terehratulina tuherata^ T. caput-serpentis, Terehrafula 

 sphenoida, Terehratula sp. (a very large species, of the size of T. Wyvil- 

 lei, Davidson, from the Antarctic seas, and very nearly allied to T. scillce 

 from the Pliocene of Southern Italy), Rhynchonella sicula. 



