GLOSSARY OF TECHNICAL TERMS. 603 



Fixed. Said of stationary forms, like barnacles. 



Fiabelliforni. Shaped like a fan or flap. 



Plabellum. Fan. 



FlagcUum. Whip. 



Fleck. Spot or stain. 



Flexuous. Bent, as the abdomen of many macrurans. 



Foliaceoiis. Leaf-like. 



Foramen. A perforation or small hole. 



Fornices. Rounded sides of shield, which protect insertion of antennae in 



certain water-fleas. 

 Fossa. Pit or socket. 

 Furca. Fork. 



Ganglion. Small or minor nerve-center. 

 Gastric-mill. Masticatory stomach, as in the lobster. 

 Gastric region. Stomach tract. 

 Gibbons. Humped or protuberant. 

 Gill. Respiratory organ. 

 Geniculation. Jointing or knotting. 

 Globose. Spherical. 

 Gnathobase. Jaw-base. 



Gnathopod. Jaw-foot ; in amphipods first and second pairs of legs. 

 Green gland. Renal or excretory organs at base of each antennae, thus some- 

 times called antennary glands, as in certain crawfishes. 



Head. Cephalon, or anterior portion of front divison of body. 



Hepatic lobe. Small lateral division of carapace, bounded behind by cervical 



groove, and internally by protogastric lobe. 

 FIcpatic spine. Spine on hepatic lobe. 

 Hiatus. Breach or aperture. 

 Hoiiwgcneoiis. With sameness of nature throughout. 



Incubatory lamella. Appendages to legs containing ova, as in amphipods, etc. 

 Intercalated. Oddly inserted, or placed between. 

 Interspinal. Between spines. 

 Iscliiiun. Basal joint of legs. 



Joint. Segment or article; with reference to the legs usually as coxal, basal, 

 ischial, meral, carpal, propodal, and terminal or dactylus ; as appendages 

 to legs usually as branchial lamella and incubatory lamella. 



Labium. Lower lip; sometimes anterior and posterior developed, with buccal 



plate and epistome, and latter with lobes and lateral corners. 

 Labrum. Upper lip. 

 Lamellate. Plate-like. 

 Lamina. Plate. 



Lense. Crystalline humor of eye. 

 Linguiform. Shaped like a tongue. 

 Littoral. Belonging in or to the shore. 

 Lobulate. Divided into little lobes. 



