140 



NEW INVERTEBRATA FROM 



CABRILLA OCCIDENTALIS gen. et sp. nov. 



The body is irregularly globular, elongated, depressed 

 above and of greenish-brown 

 color. It is covered with light- 

 green spots. The dorsal appen- 

 dages are biserial, one on each 

 side of a median line as in Tri- 

 opa. These appendages are 

 stumpy, slightly dendritic, bear- 

 ing lens-like bodies at their tips. 

 Four of these appendages are 

 larger than the remaining and 

 more laterally placed. The re- 

 mainder are more dendritic and 

 anterior. Two pairs of dendritic 

 appendages are found behind the 

 branchiae. 



There are two dorsal tentacles, one on each side of the 

 medial line. These appendages are conical, linear or sub- 

 clavate and brown at their tips, which can be readily re- 

 tracted. The branchiae are stellate, bipinnate, consisting 

 of primary arms and lateral branches, of white color, 

 transparent. These branchial plumes are situated near the 

 posterior end of the body. 



Foot disk-like, and of a brownish-green color. The 

 body is four inches in length. 



Cabrilla resembles Triopa of Johnston, but is most 

 closely allied to Plocomorphorus of Ruppel. 



The lateral appendages are slightly dendritic, as in Den- 

 dronotus, but unlike this genus there are branchial plumes. 

 Triopa has but three branchial plumes and is smaller than 

 Cabrilla. Plocomorphorus has a cloakless, slug-like body, 

 with expanded cephalic vsil and lateral appendages, plu- 

 mose branchiae and two retractile tentacles. Cabrilla dif- 



